Method of forming laminated strip metal stock for bearings



Get. 12, 193.7 Q

v L. SANDLER METHOD OF FORMING LAMINATED STRIP METAL STOCK FOR BEARINGS Filed Oct. 23, 1935 v inpefito: A 00/3 500 d/e'i- Gttorneg Patented as. 12, 1931 us'rnon or FORMING mums-ran s'rmr METAL s'rocx son assumes Louis Sandler, New Castle, Pa., minor to Johnson Bronze Company, New Castle, Pa., a corporation of Pennsylvania 7 Application October 23, 1935, Serial No. 48.296

3 Claims.

to sleeve bearings stock formed of bearing metal- 5 having a steel backing.

In the manufacture of such bearings, particu-.

larly in the class having a bronze bearing surface with a steel backing or jacket, it has been generally considered impossible to fuse bearin metal to one side of the backing strip without also coating with or fusing the bearing metal to the outer side of the bacmng while the steel strip passes through the molten bath thus malcing it unfit for use.

I have discovered a method whereby the bearing metal can be readily fused to the one side only of a steel backing strip, and at the same time leave the opposite side as smooth, and uncoated as originally. By this method I have overcome the above diiilcuity as well as cheapened the production of bearing manufacture.

In the accompanying drawing 1 have illustrated my improved method, and wherein like numerals and letters of reference indicate like parts, in

which drawing- 7 Figure l is a diagrammatic side elevation of a device involving features to assist in carrying out my invention.

Figure 2 is an enlarged end sectional view of the chamber showing the forming outlet or die.

Figure 3 is an end view of a sheet of metal such as employed in the method.

Fig. 4 is an end view of a pair of backing strips, one disposed upon .the other. Fig. 5 is a like view of the strips sealed or united at their edges.

Fig. 6 is a similar view with the bearing metal applied thereto, and

Fig. '1 is an end view of the two strips having 40 bearing metal and separated intotwo like strips.

In the practice of my improved method I provide a pair of sheet steel backing strips l5, plate i of the desired thickness and other dimensions, and place one upon the other, then seal or weld 45 the edges together, as at b, to form a single unit. After being thus formed it passes up over a plurality'of rollers 2 and down into a suitable vessel t containing molten bearing metal heated .to and maintained at the desirable temperature 50 by any suitable means not shown. The dual strip is then passed through a suitable controlled opening or forming die l comprising the slots 5 corresponding in width and'thiclrness to that of the layer of bearing metal to be fused to the 55 steel members. as at I. Asit throughthe die it enters between the drawing rollers i2--i2. As the steel strip I5 is passed down through the die, with its longitudinal edges flllingthe slots 5, the metal passes into the vacant spaces between the sides of the strip and die, thus forming a 5 layer of bearing metal on each side of the strip corresponding in cross sectionto the die opening. As will be apparent, a margin will be left on the opposite edges of the steel strip, when removed from the'die. m

In continuing the passage of the strip through the power portion of the outlet or die, which is chilled by suitable means, as by running water in a space a about a lower part of the die, it causes the bearing metal to solidify and form 5 a strip of uniform width and thickness on each side of the steel member, leaving a margin of steel at the edges.

After the strip or member is thus formed the margin or longitudinal edges i thereof is removed by suitable cutting means, and when so removed, the member I5 separates into two like laminated members (see Figure '7), each comprising a steel backed bearing stock strip, in v which the steel and bearing metals areof like width.

The member thus formed is passed through the molten metal and outlet forming die, fusing the bearing metal in the form of a strip-8' on its sides where-it is solidified as it passes through the lower 30 end of the die, after which the margins or edges are removed to form two separate steel backed bearing strips.

When the strips are separated, the back or outer surface of the steel will be found to be free of any bearing metal adhering thereto as the steel strips being sealed during the operation of applying the bearing metal it is impossible for it to enter therebetween.

The margin on the edges of the steel member 40 is, as will be apparent, preferred in the process of passing through the die to guide the member through the die opening, maintain it in position and cause the bearing metal to be of equal thickness and width, throughout its length as vwell as have the two finished strips of like form;

As will also be apparent, the margin or edges of the stock strip may be retained on' the strip and later removed.

While I prefer leavingthe steel margin on the edge of the stock to shear off, it may be that the steel and bearing metal may be of even width and shear ofl enough of both metals toseparate the steel' strips, and yet be within my invention.

Having thus shown and described my invention ent, is-

l. The method of forming dual strip material for the manufacture of bearingstrips, consisting in first providing a pair of like sheet metal strips of backingmaterial, placing the same flatwise one upon the other, sealing the longitudinal edges thereof to form a dual layer strip, applying a layer of bearing metal to the outer surfaces of said strips by passing the same into a molten body of bearing metal in a container, shaping the said layers on the strip surfaces by removing said strip through a forming die outlet in the container, and finally chilling the layers of bearing metal on 'the strips while passing out of the die.

2. The method of forming two like strips of bearing material at the same time, which consists in the following steps, providing two like strips of backing material, placing one upon the g other, welding the meeting edges together to form a temporary unit, passing said unit into a body of molten bearing metal in a container to form a layer thereof on the outer faces of said unit,jremoving said unit from the container through a forming outlet die beneath the body of metal to shape the layers of bearing metal on the unit, and then trim off the longitudinal edges of said dual strip to form two like bearing strips.

3. The method of forming two like strips of bearing material at the same time, which consists in the following steps, providing two like strips of sheet metal as backing material, placing one upon the other fiatwise, welding the meeting edges to form a temporary unit, applying bearing metal to the outer faces of said unit by passing the same into a body of molten metal within a container, removing the same through a finishing die outlet in the container beneath the body of metal to shape the layers of bearing metaland at the same time form a marginal edge on said strips, and finally removing the margins to separate into two like bearing strips. I LOUIS SANDIIER. 

